function listSelectedChanged(selected){
    var child = selected.parentNode.firstChild;
    while(child != null){
        child.className = "";
        child = child.nextSibling;
    }
    selected.className = "selected";
}

/**
* 弹出对话框
* @Param url 地址
* @Param width 宽度
* @Param height 高度
* @Param hasScroll 是否有滚动条
*/
function open_dialog(url, width, height, hasScroll){
    var left = (screen.width - width) / 2;
    var top = (screen.height - height) / 2 - 50;
    var location = "width=" + width + ", height=" + height + ", top=" + top + ", left=" + left; 
    if(hasScroll){
        window.open(url, "body", location + ", toolbar=no, menubar=no, systemMenu=no, scrollbars=yes");	
    }else{
    window.open(url, "body", location + ", toolbar=no, menubar=no, systemMenu=no");
}
}

function selectAllItems(selected, itemName){
    var chkboxs = document.getElementsByName(itemName);
    for (var i = 0; i < chkboxs.length; i++){
        chkboxs[i].checked = selected;
    }
}

/**  
 * 格式化数字显示方式   
 * 用法  
 * formatNumber(12345.999,'#,##0.00');  
 * formatNumber(12345.999,'#,##0.##');  
 * formatNumber(123,'000000');  
 * @param num  
 * @param pattern  
 */  
function formatNumber(num,pattern){   
    var strarr = num?num.toString().split('.'):['0'];   
    var fmtarr = pattern?pattern.split('.'):[''];   
    var retstr='';   
    
    // 整数部分   
    var str = strarr[0];   
    var fmt = fmtarr[0];   
    var i = str.length-1;     
    var comma = false;   
    for(var f=fmt.length-1;f>=0;f--){   
        switch(fmt.substr(f,1)){   
            case '#':   
            if(i>=0 ) retstr = str.substr(i--,1) + retstr;   
            break;   
            case '0':   
            if(i>=0) retstr = str.substr(i--,1) + retstr;   
            else retstr = '0' + retstr;   
            break;   
            case ',':   
            comma = true;   
            retstr=','+retstr;   
            break;   
        }   
    }   
    if(i>=0){   
        if(comma){   
            var l = str.length;   
            for(;i>=0;i--){   
                retstr = str.substr(i,1) + retstr;   
                if(i>0 && ((l-i)%3)==0) retstr = ',' + retstr;    
            }   
        }   
        else retstr = str.substr(0,i+1) + retstr;   
    }   
    
    retstr = retstr+'.';   
    // 处理小数部分   
    str=strarr.length>1?strarr[1]:'';   
    fmt=fmtarr.length>1?fmtarr[1]:'';   
    i=0;   
    for(var f=0;f<fmt.length;f++){   
        switch(fmt.substr(f,1)){   
            case '#':   
            if(i<str.length) retstr+=str.substr(i++,1);   
            break;   
            case '0':   
            if(i<str.length) retstr+= str.substr(i++,1);   
            else retstr+='0';   
            break;   
        }   
    }   
    return retstr.replace(/^,+/,'').replace(/\.$/,'');   
}

function isEmpty(keyword)
{
	var re = new RegExp("^[ ]*$","g");
	var r = keyword.match(re);
	if(r != null){
		return true;
	}else{
		return false;
    }
}

function chkEmpty(component, msg)
{
	if (isEmpty(component.value))
	{
		alert(msg + '不能为空！');
		component.value = '';
		component.focus();
		return false;
	}
	return true;
}