User:Whiteknight/convert.js
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Documentation for this script can be added at User:Whiteknight/convert. |
//<pre>
/* Unit conversion Javascript
Written by [[User:Whiteknight]]
Automatically convert between different sets of equivalent units
Especially Metric->American unit conversions.
Use this script by writing the following into your personal javascript file:
document.write('<script type="text/javascript" src="'
+ 'http://en.wikibooks.org/w/index.php?title=User:Whiteknight/convert.js'
+ '&action=raw&ctype=text/javascript&dontcountme=s"></script>');
*/
function ConvertUnitsLink() {
var tb = document.getElementById('p-tb').getElementsByTagName('ul')[0];
var link = document.createElement('a');
link.onclick = ConvertUnits;
link.href = "#";
link.appendChild(document.createTextNode("Convert Units"));
var li = document.createElement('li');
li.id = "custom-link";
li.appendChild(link);
tb.insertBefore(li, tb.firstChild);
}
function ConvertUnits()
{
Convert("Kg", "Lbs", "conv_mass_val", "conv_mass_unit", 2.20);
Convert("m", "Feet", "conv_dist_val", "conv_dist_unit", 3.28);
}
function Convert(munits, iunits, valtag, unittag, mtoifact)
{
var spanElements = document.getElementsByTagName('span');
for (i = 0; i < spanElements.length; i++)
{
if(spanElements[i].className == valtag)
{
var number = parseFloat(spanElements[i].innerHTML);
var result = 0.0;
if(spanElements[i].value == "SAE")
{
result = number / mtoifact;
spanElements[i].value = "Metric";
}
else
{
result = number * mtoifact;
spanElements[i].value = "SAE";
}
spanElements[i].innerHTML = result + '';
}
else if(spanElements[i].className == unittag)
{
if(spanElements[i].value == "SAE")
{
spanElements[i].innerHTML = munits;
spanElements[i].value = "Metric";
}
else
{
spanElements[i].innerHTML = iunits;
spanElements[i].value = "SAE";
}
}
}
}
$(ConvertUnitsLink);
//</pre>