String.prototype.trim = function()
{
	// 用正则表达式将前后空格
	// 用空字符串替代。
	return this.replace(/(^\s*)|(\s*$)/g, "");
}
/**
 * 统计字符串字节数
 *
 * return	integer
 */
String.prototype.ByteCount = function()
{
	txt = this.replace(/(<.*?>)/ig,'');
	txt = txt.replace(/([\u0391-\uFFE5])/ig, '11');
	var count = txt.length;
	return count;
}


//获得房屋出租内容焦点
function click_house_rent_contents_input(thisinput)
{
		document.getElementById('contents_msg').className="box_hint";
		document.getElementById('contents_msg').innerHTML='100字以内描述';
}
//失去房屋出租内容焦点
function check_house_rent_contents_input(thisinput)
{
	var verify=0;
	var count = thisinput.value.trim().ByteCount();
	var re = /([0-9]){7,12}/;
	var rehtml = /<.*?>/;
	var vkeyWords=/^[^`~!@#$%^&*()+=|\\\][\]\{\}:;'\,.<>/?]{1}[^`~!@$%^&()+=|\\\][\]\{\}:;'\,.<>?]{0,19}$/; 
     if(count < 4)
	{
		document.getElementById('contents_msg').className="box_error";
		document.getElementById('contents_msg').innerHTML='至少两个字';
	}
	else if (thisinput.value.match(rehtml))
	{
		document.getElementById('contents_msg').className = 'box_error';
		document.getElementById('contents_msg').innerHTML = '不能填写HTML代码';
	}
	else if (!thisinput.value.match(vkeyWords))
	{
		document.getElementById('contents_msg').className = 'box_error';
		document.getElementById('contents_msg').innerHTML = '不能输入非法字符';
	}
	else if ( count > 200 )
	{
		document.getElementById('contents_msg').className = 'box_error';
		document.getElementById('contents_msg').innerHTML = '不能超过100字';
	}
	else
	{
		document.getElementById('contents_msg').className = 'box_right';
		document.getElementById('contents_msg').innerHTML = '';
		verify=1;
	}	
	return verify;	
}


//
function chkForm(objForm)
{
	var objForm;
	

	if(objForm.contents)
	{
		if(!check_house_rent_contents_input(objForm.contents))
		{
			return false;
		}	
	}
}