javascript学习（三）——常用方法(2)(2)

        if(!returnvalue){ 
            returnvalue = window.ReturnValue;; 
        } 
        return returnvalue; 
    } 
    else { 
        this.returnAction = function(strResult) { 
            if (strResult != null) 
                return strResult; 
        } 
        window.open(wUrl, "", "width=" + wWidth + ",height=" + wHeight + ",menubar=no,toolbar=no,location=no,scrollbars=yes,status=no,modal=yes"); 
    } 
} 
// 关闭ModalDialog子窗口，并返回值  
function ModalDialogClose(val) { 
    if (window.showModalDialog != null)//IE判断  
    { 
        if (navigator.userAgent.indexOf("Chrome") > 0) { 
            // Chrome支持  
            window.opener.ReturnValue = val; 
        } else { 
            parent.window.returnValue = val; 
        } 
        window.close(); //firefox不支持  
    } 
    else { 
        window.opener.returnAction(val); 
        top.close(); //IE和FireFox都支持  
    } 
} 
</span> 
<span style="font-size:13px;">// 打开ModalDialog子窗口，并获取返回值
function ModalDialogOpen(wUrl, wWidth, wHeight) {
    if (window.showModalDialog != null)//IE判断
    {
        var returnvalue = window.showModalDialog(wUrl, "_self", "dialogWidth:" + wWidth + "px;dialogHeight:" + wHeight + "px;status:no;help:no;scrolling=yes;scrollbars=yes;center=yes");
        if(!returnvalue){
            returnvalue = window.ReturnValue;;
        }
        return returnvalue;
    }
    else {