you can only enter numbers: < input type= "text" onkeyup= "if (! / ^ d+$/.test (this.value)) {this.value=this.value.replace (/ < sup id=" fnref-1 "> 1 < / sup > + / g class=");}" / >
like this, you can only enter numbers and keep one place after the integer decimal point, Boss Xie
var reg = / ([0] | [1-9] *). [0-9] /;
if (! reg.test (this.value)) {
return false;}
[this.value] = reg.exec (this.value);
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