function checkusername(val) {
	if(val == '') {
		document.getElementById('cusername').src = 'pic/x.png';
	} else {
		document.getElementById('cusername').src = 'pic/i.png';
	}
}

function checkpassword() {
	if(document.signupform.rpassword.value != document.signupform.rpassword2.value) {
		document.getElementById('cpassword').src = 'pic/x.png';
		document.getElementById('cpassword2').src = 'pic/x.png';
	} else {
		document.getElementById('cpassword').src = 'pic/x.png';
		document.getElementById('cpassword2').src = 'pic/x.png';
	}	
}

function checkemail() {
	if(document.signupform.remail.value == '') {
		document.getElementById('cemail').src = 'pic/x.png';
	} else {
		document.getElementById('cemail').src = 'pic/i.png';
	}	
}