[jQuery] Image Button Acts Like "Submit" Button for JQuery Call

[jQuery] Image Button Acts Like "Submit" Button for JQuery Call


There are two image buttons on my web page that are intended to
execute javascript jquery. However, they trigger the php program on
the <form> tag action="justDoIt.php". Is there a way to fix this so
my buttons trigger jquery or an alternative solution?
These two button do not work, they trigger submit:
    <input type="image" class="delrow" src="images/rowOutDel.png"
onmouseout= this.src="images/rowOutDel.png"
onmouseover=this.src="images/rowOverDel.png"
         onmousedown=this.src="images/rowDownDel.png" />
<input type="image" class="addrow" src="images/rowOutAdd.png"
         onmouseout= this.src="images/rowOutAdd.png"
         onmouseover=this.src="images/rowOverAdd.png"
         onmousedown=this.src="images/rowDownAdd.png" />
These buttons work and trigger javascript-jquery (but are quite ugly):
<input type="button" value="del" class="delrow"/>
<input type="button" value="add" class="addrow" id="addrow"/>
Thanks loads.