function chk_input1()
{
   return (chk_one_input(document.getElementById("a1"), "上月平均工资") 
   				&& chk_one_input(document.getElementById("a2"), "本地平均工资")
				&& chk_one_input(document.getElementById("a3"), "单位缴存比例")
				&& chk_one_input(document.getElementById("a4"), "个人缴存比例"));

}
		
function get_jsjg1()
{
	if (!chk_input1())
	{
	  return false;
	}
	
	var v_a5, v_a6, v_a7, v_a8;
	
	if (parseFloat(document.getElementById("a3").value) < 0)
	{
		alert("请输入正的单位缴存比例");
		return false;
	}
	
	if (parseFloat(document.getElementById("a4").value) < 0)
	{
		alert("请输入正的个人缴存比例");
		return false;
	}
	
	v_a8 = parseFloat(document.getElementById("a1").value);
	
	if (v_a8 > parseFloat(document.getElementById("a2").value)*3)
	{
		v_a8 = parseFloat(document.getElementById("a2").value)*3;
	}
	
	if (v_a8 < parseFloat(document.getElementById("a2").value)*0.6)
	{
		v_a8 = parseFloat(document.getElementById("a2").value)*0.6;
	}
	
	v_a6 = v_a8 * parseFloat(document.getElementById("a3").value)/100;
	v_a7 = v_a8 * parseFloat(document.getElementById("a4").value)/100;
	v_a5 = v_a6 + v_a7;
	
	v_a6 = Math.round(v_a6*100)/100;
	v_a7 = Math.round(v_a7*100)/100;
	v_a5 = Math.round(v_a5*100)/100;	
		
	document.getElementById("a5").value = v_a5;
	document.getElementById("a6").value = v_a6;
	document.getElementById("a7").value = v_a7;
	return true;		  
}