Simple Javascript Search?

I'm trying to use this script:

<script>
function QuickSearch() {

var name=document.forms[0].name;
var tempdesc=document.forms[0].tempdesc;

if (name.value="780-06") {
tempdesc.value = 'Women`s Princess Cut Vest|882'
}

else if (name.value="RA32R") {
tempdesc.value = 'Womens Rib Hoody with contrast piping|2290'
}

else if (name.value="75007") {
tempdesc.value = 'WOMENS SLEEVELESS POLO|812'
}

else if (name.value="") {
tempdesc.value = ''
}}
</script>

<form>
<input type="text" name="name" value="" onblur='QuickSearch()' />
<input type="text" name="tempdesc" value="" size="45" />
</form>

to do a simple javascript search, I want to be able to enter say "RA32R" in the name box, and have the description come up, my problem is that it seems to just jump to the first value, even when nothing has been entered into the name field.