var change =0;
var bFlag=true;//全局变量,用于判断是否允许清除文本框内容
function KeyDown()
{
	e = event.keyCode; 
	if (e==13) 
	{ 
	search();
	event.returnValue= false; // 取消此事件的默认操作 
	} 
}   
 function search(){
 
 			if(Trim(document.getElementById("content").value) == "请输入信息标题、关键字、发布企业名称" || Trim(document.getElementById("content").value) == "请输入资讯标题" || Trim(document.getElementById("content").value) == "请输入企业名称、经营范围、街道搜索企业信息")
 				{
 			 	 document.getElementById("content").value=""; 
 				 document.getElementById("content").focus();
 				 jQuery("#content").css("color","#000000");
		 		 bFlag = true;
				 return false;
		 		}
 
		 	if(Trim(document.getElementById("content").value) == ""){
			 	if(change == 0){ 
			 	  	document.getElementById("content").value="请输入企业名称、经营范围、街道搜索企业信息";
		 	  	}
		 	  	else if(change == 1){
			 	  	document.getElementById("content").value="请输入信息标题、关键字、发布企业名称";
		 	  	}
		 	  	else if(change == 2){
			 	  	document.getElementById("content").value="请输入信息标题、关键字、发布企业名称";
		 	  	}
		 	  	else if(change == 3){
			 	  document.getElementById("content").value="请输入资讯标题";
		 	  	}
 	
				jQuery("#content").css("color","gray");
				bFlag = true;
				return false;
			}
		
	 	  	if(change == 0){ 
	 	  	document.getElementById("dataform").searchcontent.value=Trim(document.getElementById("content").value);
	 		document.getElementById("dataform").submit(); 
	 	  	}
	 	  	else if(change == 1){
	 	  	document.getElementById("productform").searchcontent.value=Trim(document.getElementById("content").value);
	 		document.getElementById("productform").submit();
	 	  	}
	 	  	else if(change == 2){
	 	  	document.getElementById("purchaseform").searchcontent.value=Trim(document.getElementById("content").value);
	 		document.getElementById("purchaseform").submit(); 
	 	  	}
	 	  	else if(change == 3){
	 	  	document.getElementById("informationform").searchcontent.value=Trim(document.getElementById("content").value);
	 		document.getElementById("informationform").submit(); 
	 	  	}
	 }
	 
	  function jump_company(){ 
	  		//add dai 搜索框加入默认信息
		   jQuery("#content").css("color","gray");
		   document.getElementById("content").value="请输入企业名称、经营范围、街道搜索企业信息";
		  //add dai 搜索框加入默认信息
	 change=0;
	 jQuery("#daohang1").css("display","inline"); 
	 jQuery("#daohang2").css("display","none");
	 jQuery("#daohang3").css("display","none");
	 jQuery("#daohang4").css("display","none");
	 jQuery("#hotkey").css("display","inline");
	 jQuery("#purchasehotkey").css("display","none");
	 jQuery("#producthotkey").css("display","none");
	 
	 //add daiqingsong 2010-12-2 start 改为get方式
	 jQuery("#dataform").css("display","inline");
	 jQuery("#productform").css("display","none");
	 jQuery("#purchaseform").css("display","none");
	 jQuery("#informationform").css("display","none");
	 //add daiqingsong 2010-12-2 end 改为get方式
	 
	 }
	 
	 
	 function jump_product(){ 
	  		//add dai 搜索框加入默认信息
		   jQuery("#content").css("color","gray");
		   document.getElementById("content").value="请输入信息标题、关键字、发布企业名称";
		  //add dai 搜索框加入默认信息
		 change=1;
		 jQuery("#daohang1").css("display","none"); 
		 jQuery("#daohang2").css("display","inline");
		 jQuery("#daohang3").css("display","none");
		 jQuery("#daohang4").css("display","none");
		 jQuery("#hotkey").css("display","none");
		 jQuery("#purchasehotkey").css("display","none");
		 jQuery("#producthotkey").css("display","inline");
		 
		 //add daiqingsong 2010-12-2 start 改为get方式	 
		 jQuery("#dataform").css("display","none");
		 jQuery("#productform").css("display","inline");
		 jQuery("#purchaseform").css("display","none");
		 jQuery("#informationform").css("display","none");
		 //add daiqingsong 2010-12-2 end 改为get方式
		 
	 }
	  function jump_purchase(){
	  	 //add dai 搜索框加入默认信息
		   jQuery("#content").css("color","gray");
		    document.getElementById("content").value="请输入信息标题、关键字、发布企业名称";
		  //add dai 搜索框加入默认信息
	  change=2;
	 jQuery("#daohang1").css("display","none");
	 jQuery("#daohang2").css("display","none");
	 jQuery("#daohang3").css("display","inline");
	 jQuery("#daohang4").css("display","none");
	 jQuery("#hotkey").css("display","none");
	 jQuery("#producthotkey").css("display","none");
	 jQuery("#purchasehotkey").css("display","inline");
	 //add daiqingsong 2010-12-2 start 改为get方式	 
	 jQuery("#dataform").css("display","none");
	 jQuery("#productform").css("display","none");
	 jQuery("#purchaseform").css("display","inline");
	 jQuery("#informationform").css("display","none");
	 //add daiqingsong 2010-12-2 end 改为get方式
	 }
	 function jump_information(){
	  	 //add dai 搜索框加入默认信息
		   jQuery("#content").css("color","gray");
		    document.getElementById("content").value="请输入资讯标题";
		  //add dai 搜索框加入默认信息
	  change=3;
	 jQuery("#daohang1").css("display","none");
	 jQuery("#daohang2").css("display","none");
	 jQuery("#daohang3").css("display","none");
	 jQuery("#daohang4").css("display","inline");
	 jQuery("#hotkey").css("display","none");
	 jQuery("#producthotkey").css("display","none");
	 jQuery("#purchasehotkey").css("display","none");
	  //add daiqingsong 2010-12-2 start 改为get方式	 
	 jQuery("#dataform").css("display","none");
	 jQuery("#productform").css("display","none");
	 jQuery("#purchaseform").css("display","none");
	 jQuery("#informationform").css("display","inline");
	 //add daiqingsong 2010-12-2 end 改为get方式
	 }
	 
 function LTrim(str){ 
		 var i;
		 for(i=0;i<str.length-1;i++){
		  if(str.charAt(i)!=" "&&str.charAt(i)!=" ") 
		  break;
	 }
	 str = str.substring(i,str.length);
	 return str;
	 }
	 
	function RTrim(str){
		var i;
		for(i=str.length-1;i>=0;i--){
			if(str.charAt(i)!=" "&&str.charAt(i)!=" ") 
			break;
		}
		str = str.substring(0,i+1);
		return str;
	}
	function Trim(str){ 
		return LTrim(RTrim(str)); 
	}
	
	 
	function searchByCategory(typeid,typename,cleantype)
	{
	document.dataformcategory.typeid.value=typeid;  
	document.dataformcategory.typename.value=typename;
	document.dataformcategory.cleantype.value=cleantype;
	document.dataformcategory.category.value=1;
	document.getElementById("dataformcategory").submit();
	}
	
	function searchByKey(searchcontent,cleantype)
	{
	document.dataformcategory.searchcontent.value=searchcontent;
	document.dataformcategory.cleantype.value=cleantype;
	document.getElementById("dataformcategory").submit();
	}
	
	function searchAllCategory(categoryid){ 
	document.allcategory.category.value=categoryid; 
	document.allcategory.target="_blank";
	document.getElementById("allcategory").submit();  
	}
	

//用于清除输入框中提示信息的方法
function clearTip(){
        var oTxt=document.getElementById("content");
         if(bFlag==true){
           oTxt.value="";
           bFlag=false;
           jQuery("#content").css("color","black");
        }
        if(Trim(document.getElementById("content").value) == "请输入信息标题、关键字、发布企业名称" || Trim(document.getElementById("content").value) == "请输入资讯标题" || Trim(document.getElementById("content").value) == "请输入企业名称、经营范围、街道搜索企业信息")
        {
           oTxt.value="";
           bFlag=false;
           jQuery("#content").css("color","black");
        }
}

function searchProduct(){ 
 	document.getElementById("productform").searchcontent.value=Trim('<%=content%>');
	document.getElementById("productform").submit(); 
 }
function searchPurchase(){ 
	document.getElementById("purchaseform").searchcontent.value=Trim('<%=content%>');
	document.getElementById("purchaseform").submit(); 
}