function doSearch() 
    {
        var keyname = trim(document.getElementById("keyname").value);
        if(keyname=="请输入关键字")
        {
            keyname="";
        }
    }
	function trim(inputString) {

if (typeof inputString != "string") { return inputString; }
var retValue = inputString;
var ch = retValue.substring(0, 1);
while (ch == " ") { 
  
  retValue = retValue.substring(1, retValue.length);
  ch = retValue.substring(0, 1);
}
ch = retValue.substring(retValue.length-1, retValue.length);
while (ch == " ") {
 
 retValue = retValue.substring(0, retValue.length-1);
 ch = retValue.substring(retValue.length-1, retValue.length);
}
while (retValue.indexOf("  ") != -1) { 
 
 retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); 
}
return retValue;
} 
function keywords(ControlsName,n) 
{
    if (n == 0 && ControlsName.value == "请输入关键字"){ControlsName.value=""}
    if (n == 1)
    {
        if(ControlsName.value == "请输入关键字"){ControlsName.value="";}
    }
    if (n == 2 && ControlsName.value == "")
    {
        ControlsName.value = "请输入关键字";
    }
}