document.getElementsByClassName = function(eleClassName)
{
var getEleClass = [];//定义一个数组
var myclass = new RegExp("\\b"+eleClassName+"\\b");//创建一个正则表达式对像
var elem = this.getElementsByTagName("*");//获取文档里所有的元素
for(var h=0;h<elem.length;h++)
{
var classes = elem[h].className;//获取class对像
if (myclass.test(classes)) getEleClass.push(elem[h]);//正则比较，取到想要的CLASS对像
}
return getEleClass;//返回数组
}

function getDetailType(str)
{	
	var obj = document.getElementById(str);
	var objs = document.getElementsByClassName("show");
	for (var i = 0; i < objs.length ; i++)
	{
		objs[i].className = "not_show";
	}
	obj.className = "show";
}

function getDetailSel(str)
{
	newid = str + 'sel';
	var obj = document.getElementById(newid);
	var objs = document.getElementsByClassName("show1");
	for (var i = 0; i < objs.length ; i++)
	{
		objs[i].className = "not_show1";
	}
	obj.className = "show1";
}

function showarea(cat,subcat,province,city){
	//cat subcat
    var i=0;
    for (i=0;i <cat.length; i++)
        {
            if (cat[i][1] == province)
            { 
                obj1 = cat[i][0];
            }     
        }
    var k=0;
    for (k=0;k <cat.length; k++)
        {
            if (subcat[k][1] == city)
            { 
                obj2 = subcat[k][0];
            }
        }	
	alert(obj1+obj2);
}

function checkLength(which,maxChars,span_id) {
if (which.value.length > maxChars)
which.value = which.value.substring(0,maxChars);
var curr = maxChars - which.value.length;
//document.getElementById(span_id).innerHTML = curr.toString();
}