function ltrim(str) { 
	for(var k = 0; k < str.length && isWhitespace(str.charAt(k)); k=k+1);
	return str.substring(k, str.length);
}
function rtrim(str) {
	for(var j=str.length-1; j>=0 && isWhitespace(str.charAt(j)) ; j=j-1) ;
	return str.substring(0,j+1);
}

//trim space on both sides of string s.
function trim(str) {
	return ltrim(rtrim(str));
}


function isWhitespace(charToCheck) {
	var whitespaceChars = " \t\n\r\f";
	return (whitespaceChars.indexOf(charToCheck) != -1);
}

function len(s) { 
	var l = 0; 
	var a = s.split(""); 
	for (var i=0;i<a.length;i++) { 
		if (a[i].charCodeAt(0)<299) { 
			l++; 
		} else { 
			l+=2; 
		} 
	} 
	return l; 
}

function searchcode(){
	var keyword=document.getElementById("keyword"); 
	var code_str = keyword.value;
	keyword.value="";
	window.location = "Search.aspx?farmno=" + code_str;
}
function setKeyword(){
		var keyword = document.getElementById("keyword");
		if(keyword.value=="请输入您的产品编码"){
			keyword.value = "";

}
if (keyword.value == "Input your product code") {
    keyword.value = "";
}
	}


function getArgsFromHref(sHref, sArgName){
	var args = sHref.split("?"); 
	var retval = ""; 
	if(args[0] == sHref){ 
		return retval;
	} 
	var str = args[1]; 
	args = str.split("&"); 
	for(var i = 0; i < args.length; i ++) { 
		str = args[i]; 
		var arg = str.split("="); 
		if(arg.length <= 1) 
			continue; 
		if(arg[0] == sArgName) 
			retval = arg[1]; 
	} 
	return retval; 
}


  //获取当前的x坐标值

　　    function pageX(elem)
　　    {
            return elem.offsetParent?(elem.offsetLeft+pageX(elem.offsetParent)):elem.offsetLeft;
        }

　　//获取当前的Y坐标值
        function pageY(elem)
        {
            return elem.offsetParent?(elem.offsetTop+pageY(elem.offsetParent)):elem.offsetTop;
        }