function Ck_form(){
		var obj = document.form1;
		if (obj.username.value==''){
			alert('请填写注册用户名！');
			obj.username.focus();
			return false;
		}
		if (obj.startyear.value==''){
			alert('请确认入学年份！');
			obj.startyear.focus();
			return false;
		}
		if (obj.password.value==''){
			alert('请输入密码！');
			obj.password.focus();
			return false;
		}
		if (obj.rpassword.value==''){
			alert('请确认密码！');
			obj.rpassword.focus();
			return false;
		}
		if (obj.password.value!=obj.rpassword.value){
			alert('两次密码不一致,请重新输入！');
			obj.password.value=='';
			obj.rpassword.value=='';
			obj.password.focus();
			return false;
		}
		if (obj.guider.value==''){
			alert('请输入CCAP导师！');
			obj.guider.focus();
			return false;
		}

		if (obj.degree.value==''){
			alert('请输入学位！');
			obj.degree.focus();
			return false;
		}
		if (obj.company.value==''){
			alert('请输入工作单位！');
			obj.company.focus();
			return false;
		}
		if (obj.address.value==''){
			alert('请输入地址！');
			obj.address.focus();
			return false;
		}
		if (obj.tel.value==''){
			alert('请输入电话！');
			obj.tel.focus();
			return false;
		}
		if (obj.mail.value==''){
			alert('请输入E-mail！');
			obj.mail.focus();
			return false;
		}
	}