function trim(str)
{
 if(str.charAt(0) == " ")
 {
  str = str.slice(1);
  str = trim(str); 
 }
 return str;
}
function IsDigit(cCheck)
    {
    return ((cCheck>='0') && (cCheck<='9'));
    }

function IsAlpha(cCheck)
    {
    return ((('a'<=cCheck) && (cCheck<='z')) || (('A'<=cCheck) && (cCheck<='Z')))
    }

function checkInput()
{
    var username =form_head.username.value;
	var password =form_head.password.value;
//    alert(username);
	if( trim(username).length==0 )
	{  
	    alert("请输入您的用户名");
        form_head.username.focus();
        return false;
    }
	if( trim(password).length==0 )
	{  
	    alert("请输入您的密码");
        form_head.password.focus();
        return false;
    }
    username=username.toLowerCase();
	form_head.username.value=username;
    return true;

}
function checkInput1()
{
    var username =form1.username.value;
	var password =form1.password.value;
 //   alert(username);
	if( trim(username).length==0 )
	{  
	    alert("请输入您的用户名");
        form1.username.focus();
        return false;
    }
	if( trim(password).length==0 )
	{  
	    alert("请输入您的密码");
        form1.password.focus();
        return false;
    }
    username=username.toLowerCase();
	form1.username.value=username;
    return true;

}
function qhmm()
{
    window.open("/htm/wxjs/qhm.jsp","取回密码","height=210,width=350,top=0,left=0,toolbar=no,menubar=no,resizable=no,status=no");
}