Javascript regular control text boxes can only enter integers or floating point Numbers

JS part of the code is as follows:

function CheckInputIntFloat(oInput) 
{ 
if('' != oInput.value.replace(/d{1,}.{0,1}d{0,}/,'')) 
{ 
oInput.value = oInput.value.match(/d{1,}.{0,1}d{0,}/) == null ? '' :oInput.value.match(/d{1,}.{0,1}d{0,}/); 
} 
}

HTML part code (sample) :

<input type="text" id="input1" name="input1" onkeyup="javascript:CheckInputIntFloat(this);" />