[RESOLVED] javascript listbox not working

[chris1990]

I've made a taxi fare calculator using google maps, and now im trying to add extra functionality, but i cant get the following code to work.

The idea is that once its calculated and displayed the fare in "txtFare", then to find the fare for a "bus", its selected from the list box and multiply's "txtFare" by '1.50' and displays it in "txtTypeFare".

This function doesn't work, and i can't see why not.

	function calcType() {
   	var VehType = document.getElementById("sVehicle").innerHTML;
	var EstFare = document.getElementById("txtFare").value;
	
    	if (VehType = "car")
    		{document.getElementById("txtTypeFare").value = EstFare};
    	if (VehType = "estate")
    	   	{document.getElementById("txtTypeFare").value = EstFare * 1.25 };
    	if (VehType = "bus")
       		{document.getElementById("txtTypeFare").value = EstFare * 1.50};
    	if (VehType = "exec")
	       	{document.getElementById("txtTypeFare").value = EstFare * 1.75};
	}

    <b>Fare: </b>
		<input id="txtFare" type="textbox" value="">        
        <input type="button" value="fare" onClick="calcFare();">
    <b>Vehicle: </b>
		<select id="sVehicle" onChange="calcType()">
		  <option value="car">Car</option>
		  <option value="estate">Estate</option>
		  <option value="bus">Mini-Bus</option>
		  <option value="exec">Executive</option>		  
		</select>
		<input id="txtTypeFare" type="textbox" value=""> 

Thanks in advance