input输入框只能输入正整数

<input type="text" id="price"
onkeyup="if(this.value.length==1){this.value=this.value.replace(/[^1-9]/g,'')}else{this.value=this.value.replace(/\D/g,'')}"
onafterpaste="if(this.value.length==1){this.value=this.value.replace(/[^1-9]/g,'0')}else{this.value=this.value.replace(/\D/g,'')}" />

$("#totalCnt").change(function () {
var totalCnt = $("#totalCnt").val();
if (totalCnt != parseInt(totalCnt)){
$.sobox.alert(
'温馨提示',
'请输入正确的正整数',
function () {
$("#totalCnt").val("");
}
)
return false;
}
})