如何让我的javascript计算器计算十进制数？

目前我的简单javascript计算器能够计算整数.然而,它无法使用像3,4或9,2等十进制数字这样做... getal1和getal2代表number1和number2.函数分别是加号,减号,乘号和除数.

function plus()
{
	var getal1 = document.getElementById('getal1').value;
	var getal2 = document.getElementById('getal2').value; 
	document.getElementById('resultaat').value=parseInt(getal1) +  parseInt(getal2);
	document.form1.submit();
}
  
function min()
{
	var getal1 = document.getElementById('getal1').value;
	var getal2 = document.getElementById('getal2').value; 
	document.getElementById('resultaat').value=parseInt(getal1) - parseInt(getal2);
	document.form1.submit();
}
  
function keer()
{
	var getal1 = document.getElementById('getal1').value;
	var getal2 = document.getElementById('getal2').value; 
	document.getElementById('resultaat').value=parseInt(getal1) * parseInt(getal2);
	document.form1.submit();
}
  
function delen()
{
	var getal1 = document.getElementById('getal1').value;
	var getal2 = document.getElementById('getal2').value; 

	document.getElementById('resultaat').value=parseInt(getal1) / parseInt(getal2);
	document.form1.submit();
}

	
		
		
		
	
		
		
			

			
			
				

					
						Geef 1e getal :
					
					
				

					
						Geef 2e getal :
					
					
				
				
			
			

				
					+
				
				
					-
				
				
					x
				
				
					/
				
			
				

				
			
				

					
						Resultaat
					
					
				
				
			
			
		

function plus() {
    var getal1 = document.getElementById('getal1').value;
    var getal2 = document.getElementById('getal2').value;
    document.getElementById('resultaat').value = parseFloat(getal1) + parseFloat(getal2);
    document.form1.submit();
}