javascript公共函数

//字符截取
function str_slice_10(str){
var slice_end = 0;
var s_count = 0;
var len = Req.str_len(str);
for(var i=0;i<len;i++)
{
    if(s_count == 10)
    {
    return str.substring(0 , i);
    break;
    }else if(s_count == 11)
    {
    return str.substring(0 , i-1);
    break;
    }
    if(str.charCodeAt(i)<255)    //非汉字
    {
    s_count++;
    }else{
    s_count += 2;
    }
}
return str.substring(0 , i);
}
//计算长度
function str_len(fData) {
var intLength=0;
for (var i=0;i<fData.length;i++) {
    if ((fData.charCodeAt(i) < 0) || (fData.charCodeAt(i) > 255))
    intLength=intLength+2;
    else
    intLength=intLength+1;
}
return intLength;
}
//阻止冒泡
function stopEventPropagation(e){
    if(window.event){
        window.event.cancelBubble = true;
        return false;
    }else{
        e.stopPropagation();
    }     
}
//用js实现锚点功能
function pub_loveinfo_scrolltop(id)
{
    var ot;
    if(id)
    {
        ot=$('#'+id).offset().top;
    }
    else
    {
        ot=0;
    }
    $(document).scrollTop(ot);
}
//cookie操作
function setCookie(name , val){
    if(!name || !val) return;
    var date = new Date();
    date.setTime(date.getTime()+2*3600*1000);
    var newCookie = name +"="+val+";domain=my.51.com;path=/;expires="+date.toGMTString();
    document.cookie = newCookie;
}
function getCookie(name){
    var nowCookie = document.cookie;
    if(nowCookie == "" || nowCookie== undefined){
        return '';
    }
    var cookieArr = nowCookie.split(";");
    var myCookie = '';
    var i=0
    for(i;i<cookieArr.length;i++){
        if(cookieArr[i].indexOf(name+"=") !== -1)
        {   
            myCookie= cookieArr[i];
            break;
        }
    }
    if(!myCookie) return '';
    var reg = name+ "=";
    return myCookie.replace(reg , "");
}
//打开新窗口
function openNewWindow(url) {
    var html = '<form id="ow" name="ow" method="post" action="'+url+'" target="_blank"></form>';
    var owDiv = document.createElement("div");
    owDiv.innerHTML = html;
    document.body.appendChild(owDiv);
    document.ow.submit();
    owDiv.innerHTML = "";
}