alphabeta12 Posted December 18, 2008 Share Posted December 18, 2008 i am trying to make a useful calculator that converts metric values using a drop down menu.i just need a value to come up in the second input field.i have know idea what is wrong, but it's mostly a problem with the select boxes. <body><br><input type="text" name="num1"><select name="unit1"><option value="-9">nm</option><option value="-6">µm</option><option value="-3">mm</option><option value="-2">cm</option><option value="-1">dm</option><option value="0" selected="selected">m</option><option value="1">dam</option><option value="2">hm</option><option value="3">km</option><option value="6">Mm</option><option value="9">Gm</option><option value="12">Tm</option></select><br><input type="button" value="convert" onclick="document.num2.value=(math.pow(10,(document.unit1.value-document.unit2.value)))*document.num1.value"><br><input type="text" name="num2"><select name="unit2"><option value="-9">nm</option><option value="-6">µm</option><option value="-3">mm</option><option value="-2">cm</option><option value="-1">dm</option><option value="0" selected="selected">m</option><option value="1">dam</option><option value="2">hm</option><option value="3">km</option><option value="6">Mm</option><option value="9">Gm</option><option value="12">Tm</option></select></body> Link to comment Share on other sites More sharing options...
inktherapy Posted December 18, 2008 Share Posted December 18, 2008 Do you still need the second input? are you converting 2 entry datas? or you're comparing? how does it work? Link to comment Share on other sites More sharing options...
alphabeta12 Posted December 18, 2008 Author Share Posted December 18, 2008 there is an input for the number, and a drop down for the units. there is also a drop down for the units to convert to. then there is a final input that is used as the output. Link to comment Share on other sites More sharing options...
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